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severe storm

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panos View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote panos Quote  Post ReplyReply Direct Link To This Post Topic: severe storm
    Posted: 25 February 2009 at 16:00
Hi,

We were out last weekend and sailed in the Saronic golf near Athens. We run into a severe storm, as seen on the wind instrument.



Our boat handled the storm very good. Actually we didn't think that the wind was nearly as strong. Without looking to the instrument I would say that the wind was about 20-25 knotts.
Simrad has to explain why the wind instrument showed these crazy values. The sensor on the mast top turned normally fast, so it must be an fault of the electronics.
Any comments?

Panos

Hanse 630e - selling her -
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Rubato View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Rubato Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2009 at 16:14
Hi Panos.
That must have been quite the blow!!
This has happened on my IS-12 system. High wind alarms started going off and the readings were 200+. Did your system return to normal at some point? If I remember correctly, mine did not and the only way I was able to get normal operation again was to do a system reset.
Steve
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Johan Hackman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Johan Hackman Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2009 at 16:16
I beat you, Panos. I had an apparent wind speed of 126 m/s last summer - 252 knots! The true wind was displayed to be 17 m/s, something which was not reflected in boat speed or sea state, as you can see from the picture.

I have reported this to Simrad and it has only happened once.

Johan

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Peter-Blake View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Peter-Blake Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2009 at 17:02
I was in January on the boatshow Düsseldorf and talked to Navico about my problems with my simrad wind IS20. Sometimes it gets crazy and shows strange angels and strange winds. Not always, but sometimes.
 
They told me that in some Hanses from 2008 (mine is from april 2008) the cable in the mast is not  shielded (may be wrong cable or false production, they did not tell). So the windvane does show wrong numbers. I think this is a fault from simrad and not from hanse as the cable is simnet.
 
Now they will send me a t-joiner for the simnet and in addition a plug in
anti-interference capacitor. (Hope it is the right word). They told me, if i install it at the connector for the windvane under deck the problems will be solved. I will tell you if it works after the beginning of my new season.
 
No one at the hanse yard could help me so far. Hanse changed already my wind IS20 two times! Interesting that navico/simrad new about the problem which seems to exist only on hanses as i was told.


Edited by Peter-Blake - 25 February 2009 at 17:09
Blake 370
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Johan Hackman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Johan Hackman Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2009 at 22:16
Peter-Blake, why did they replace your IS20 Wind twice? Was it because of the strange readings?

Johan
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Peter-Blake View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Peter-Blake Quote  Post ReplyReply Direct Link To This Post Posted: 26 February 2009 at 06:30

The first is20 wind showed after one hr. sailing on our testtrip with a employee from hanse strange readings and  stopped later working completely. Hanse changed all the equipment including Autopilot computer and ap24. It happened while sailing about 2 miles away from a thunderstorm. May be the static electricity in the air caused this problem. (Sorry i am not electrician, may be i am totally wrong). They did not change the cable in the mast!

The second time it was changed because of the strange readings again. But they still did not change the cable or thought about the cable. This all was done by Hanse.
 
Now Simrad will help me with this anti-interference capacitor. I hope it works.
Blake 370
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colincooper View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote colincooper Quote  Post ReplyReply Direct Link To This Post Posted: 26 February 2009 at 06:55
That seems a very odd explaination.  The shielding in a Simnet cable is intregal to the system.   The installer just plugs in the cable.  If they have to add a capacitor at the base of the mast then that implies that the problem is wrong cables - not just missing shielding. Or possibly a fault in the terminator in the vane.   If I were you, I'd ask a few more questions.
Colin (owner of Hilde - a 370)
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Peter-Blake View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Peter-Blake Quote  Post ReplyReply Direct Link To This Post Posted: 26 February 2009 at 07:41
Thanks colin,
 
as the guy from simrad told me that they solved the problem this way on several boats, i will give it a try. But i will ask some more questions and will tell you as soon as i get a answer.
Blake 370
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colincooper View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote colincooper Quote  Post ReplyReply Direct Link To This Post Posted: 26 February 2009 at 08:00
The other possible error is that the cable is damaged and shorting the screen to the mast.  If so then the cable needs replacing as it could get worse.
Colin (owner of Hilde - a 370)
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panos View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote panos Quote  Post ReplyReply Direct Link To This Post Posted: 26 February 2009 at 08:01
Hi,
The abnormal readings in my case also happened during a thunderstorm. Later when we we far from the lightnings ,the readings returned to normal.

@Peter-Blake: Do you have a drawing and the value of the capacitor ?
Panos

Hanse 630e - selling her -
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